Polevoy G. ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR Períodos sensitivos para el desarrollo de la resistencia de los escolares (Sensitive periods for the development of endurance of schoolchildren): ARTICLE RETRACTED DUE TO PLAGIARISM BY THE AUTHOR. Retos. 2024;55:672-678. doi:10.47197/retos.v55.104093